High Prevalence of Gymnophalloides Seoi Infection in a Village on a Southwestern Island of the Republic of Korea

Soon-Hyung LeeDepartment of Parasitology and Institute of Endemic Diseases, Seoul National University College of Medicine, Department of Parasitology, College of Medicine, Kon-Kuk University, Department of Parasitology, College of Medicine, Inje University, Department of Parasitology, College of Medicine, Dong-A University, Seoul, Republic of Korea

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Jong-Yil ChaiDepartment of Parasitology and Institute of Endemic Diseases, Seoul National University College of Medicine, Department of Parasitology, College of Medicine, Kon-Kuk University, Department of Parasitology, College of Medicine, Inje University, Department of Parasitology, College of Medicine, Dong-A University, Seoul, Republic of Korea

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Ho-Jin LeeDepartment of Parasitology and Institute of Endemic Diseases, Seoul National University College of Medicine, Department of Parasitology, College of Medicine, Kon-Kuk University, Department of Parasitology, College of Medicine, Inje University, Department of Parasitology, College of Medicine, Dong-A University, Seoul, Republic of Korea

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Sung-Tae HongDepartment of Parasitology and Institute of Endemic Diseases, Seoul National University College of Medicine, Department of Parasitology, College of Medicine, Kon-Kuk University, Department of Parasitology, College of Medicine, Inje University, Department of Parasitology, College of Medicine, Dong-A University, Seoul, Republic of Korea

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Jae-Ran YuDepartment of Parasitology and Institute of Endemic Diseases, Seoul National University College of Medicine, Department of Parasitology, College of Medicine, Kon-Kuk University, Department of Parasitology, College of Medicine, Inje University, Department of Parasitology, College of Medicine, Dong-A University, Seoul, Republic of Korea

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Woon-Mok SohnDepartment of Parasitology and Institute of Endemic Diseases, Seoul National University College of Medicine, Department of Parasitology, College of Medicine, Kon-Kuk University, Department of Parasitology, College of Medicine, Inje University, Department of Parasitology, College of Medicine, Dong-A University, Seoul, Republic of Korea

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Weon-Gyu KhoDepartment of Parasitology and Institute of Endemic Diseases, Seoul National University College of Medicine, Department of Parasitology, College of Medicine, Kon-Kuk University, Department of Parasitology, College of Medicine, Inje University, Department of Parasitology, College of Medicine, Dong-A University, Seoul, Republic of Korea

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Min-Ho ChoiDepartment of Parasitology and Institute of Endemic Diseases, Seoul National University College of Medicine, Department of Parasitology, College of Medicine, Kon-Kuk University, Department of Parasitology, College of Medicine, Inje University, Department of Parasitology, College of Medicine, Dong-A University, Seoul, Republic of Korea

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Young-Jin LimDepartment of Parasitology and Institute of Endemic Diseases, Seoul National University College of Medicine, Department of Parasitology, College of Medicine, Kon-Kuk University, Department of Parasitology, College of Medicine, Inje University, Department of Parasitology, College of Medicine, Dong-A University, Seoul, Republic of Korea

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Gymnophalloides seoi (Digenea: Gymnophallidae), a new human intestinal trematode reported from a Korean woman who complained of epigastric discomfort, has been shown to be highly prevalent among the villagers of a southwestern island of the Republic of Korea. For the detection of human infections, fecal examinations were conducted on the inhabitants of a seashore village, where the first patient with a G. seoi infection had resided. Of 98 inhabitants examined, 70 (71.4%) were infected with various intestinal parasites; among them, G. seoi showed the highest rate of egg positivity 48 of 98 (49.0%). Individual worm burdens of G. seoi, as measured by collection of adult flukes after anthelmintic treatment and purgation, ranged from 106 to 26,373 specimens (average per infected case = 3,326). There was no sex-related difference in the prevalence of G. seoi, and the age distribution of the infected cases showed a relatively even pattern. This study confirms that human infection by G. seoi is not an incidental one and provides the first evidence of its high prevalence on this Korean island.

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